STAR*NET V6 - Circe

Instrument Options
Standard Error Settings
Chapter 4 Options
Standard errors are used in weighting your data. In this dialog, you enter standard error
values for most types of observations used in an adjustment. Your observations will
default to these values unless explicit values are entered with the observations in your
data, or unless you use “Instrument Library” inline options to apply alternate values.
Linear and angular units shown in this dialog are based on the project units set in the
Adjustment Options. If you change the units settings in the Adjustment Options dialog
(from FeetUS to Meters, or DMS to GONS for example), the standard error values and
their displayed units in the dialog shown above are automatically converted. You never
have to manually convert standard error values from one unit to another.
When working in DMS, angular standard errors are entered in seconds. And when
working in GONS, standard errors are entered in milligons, where one milligon is equal
to 1/1000 GON. (There are about 0.309 milligons per second.)
Standard error values initially provided as defaults during program installation are
arbitrary. You should always reset the values to those consistent with the actual
instruments and procedures used for your project! If you determine that your projects
normally use certain option values, you can change the startup defaults for new projects
by revising the values in the Company Options. See “Company Options” later in this
chapter for details.
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